Aguilera called it one of favorite videos of all time, and said it was "living life at 21 at its best."

She pointed out that she was twerking in the music video, though the dance move didn't have a name at the time.

"What was funny about this video was that I didn't think it was anything to me," Aguilera said. "I was just having so much fun with my girls and years later, it was called 'twerking' I guess, but it had been around for a long time."

She added: "I was spending time with a lot of dancers that were doing it before it was a thing that was even given a name."

Watch the video below (Aguilera talks about her "Dirrty" music video at 2:46).